Question

Please answer this question​

Answer 1

Answer:

R3=R1+R2

then substitute the values we will get

R3=8+8=16

R3=16ohms

Answer 2

$\frac{1}{2} = \frac{1}{8} + \frac{1}{8} + \frac{1}{r3}$

$\frac{1}{2} = \frac{1}{4} + \frac{1}{r3} \\ \frac{1}{2} - \frac{1}{4} = \frac{1}{r3} \\ \frac{2}{8} = \frac{1}{r3} \\ r3 = 4 \: ohm$

I hope this helps ( ╹▽╹ )